Considering the rising prices of cryptocurrencies as of 2017 especially when 1 bitcoin is roughly equivalent to 11200$ people are cursing themselves thinking why didn't they buy bitcoins when it was around 1$. But, sadly we can't go back in time (as of now :P). One thing that we can do is make the right choices. One such choice would be:
DeepOnion
Deep Onion is an anonymous cryptocurrency that boasts of integration with the TOR network. With increased levels of privacy offered by DeepOnion, the likelihood of users being hacked or attacked decreases greatly be it by legal & illegal entities. DeepOnion aims to guarantee one's anonymity. If you believe in privacy focused cryptos then no doubt this is the coin for you.
As of it's launch in July 2017, it was trading at around 0.11$, right now as of December 3rd it is already at 1.8$. That is a 1500% increase in a matter of 5 months! I would say that for 2018 this is one cryptocurrency that you must definitely look out for.